Sony Alpha a6400 Black 2019

The a6400's autofocus is in the 89th percentile, making it one of the best on the market for tracking subjects. The 11fps burst and flip screen are great for creators, but the build quality is a real weak spot at the 9th percentile. It's a fantastic focusing machine in a body that feels its price.

This camera's party trick is its Real-Time Eye AF and subject tracking. It's one of the best on the market, and you feel it immediately. The 11fps mechanical burst with continuous autofocus is well above average, letting you rip through a sequence and nail focus on nearly every shot. Video is solid, with oversampled 4K and 1080p at 120fps for smooth slow motion, though the lack of in-body stabilization means you'll rely on a tripod or lenses with OSS for steady handheld footage. The 20.1MP APS-C sensor delivers crisp, natural colors, but its performance is more 'strong' than 'leading' compared to newer stacked sensors.

Stacked against the Fujifilm X-T5, the Sony wins on autofocus speed and video features, but the Fuji demolishes it in build quality and has in-body stabilization. The Canon EOS R6 Mark III is in a different league for burst speed and full-frame low-light performance, but it's also much pricier. The Panasonic LUMIX S5 II offers better stabilization and video tools for a similar investment, though its autofocus, while improved, still can't quite match Sony's real-time tracking. The a6400 carves out a niche as the lightweight, affordable autofocus champion.

Pricing for the a6400 is all over the map, with a spread of over $176,000 across vendors, which is clearly a data error on the high end. Realistically, you'll find the body and kit lens combo hovering around $825 to $1,000. At that price, the autofocus performance you're getting is a steal. You're essentially paying for a top-tier focusing system in a budget-friendly body, making it a fantastic entry point for serious hobbyists who don't want to fight their gear.

The Sony a6400's autofocus is a standout, landing in the 89th percentile of our database. That means it locks onto subjects faster and more reliably than the vast majority of mirrorless cameras we've tested. The 425 phase-detect points covering 84% of the sensor make it a real treat for anything that moves, from kids to pets to street photography. But the build quality is a genuine letdown, sitting in the 9th percentile. There's no weather sealing, so you'll want to be careful around dust and moisture.

Skip the a6400 if you shoot in rough weather or need a tank-like camera. The build quality is in the 9th percentile, meaning it's one of the least durable-feeling bodies we've tracked, with zero weather sealing. Travel photographers who want an all-in-one rugged solution should look elsewhere, as our data shows it scores a weak 46.1 out of 100 for travel. If you hate carrying spare batteries, the mediocre 47th percentile battery life will also be a constant annoyance.

The Sony a6400 is a camera with a split personality. Its autofocus system is best-in-class and a genuine joy to use, making it easy to recommend for action, portraits, and vlogging. But you have to accept its glaring weaknesses: a plasticky, unsealed body and no sensor stabilization. If you can live with those trade-offs and plan to pair it with a sharp lens, you're getting one of the best focusing experiences for the money. Just don't take it out in the rain.